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Reservoir Sedimentation and Flood Control: Using a Geographical Information System to Estimate Sediment Yield of the Songwe River Watershed in Malawi

Author

Listed:
  • Kondwani G. Munthali

    (Division of Spatial Information Science, Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8572, Japan)

  • Brian J. Irvine

    (School of Geography, University of Leeds, Leeds LS2 9JT, UK)

  • Yuji Murayama

    (Division of Spatial Information Science, Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8572, Japan)

Abstract

Severe watershed degradation continues to occur in the tropical regions of southern Africa. This has raised interest to harness and manipulate the potential of the watershed resources for human benefit as the populations grow. Songwe River is one such degrading watershed causing biennial flooding among other problems. In this study, climatic, land use, topographic and physiographic properties were assembled for this watershed and used in a process-based Geographical Information System (GIS) with the aim of determining the hydrological sediment potential of Songwe River watershed and quantifying possibilities of reservoir sedimentation. The study further aimed at determining the critical sediment generating areas for prioritized conservation management and the relationship between the increasing flood events in the floodplains and the rainfall trends. Based on hydrological runoff processes using the Pan-European Soil Erosion Risk Assessment (PESERA) model, the estimated amount of sediment transported downstream is potentially huge. Most of the sediment generation was established to be occurring in the upper sub-basin and specifically from built up village and degraded natural land. These trends have not only caused the increased flooding events in the lower sub-basin, but also pose a great sustainability risk of sedimentation to the proposed reservoir.

Suggested Citation

  • Kondwani G. Munthali & Brian J. Irvine & Yuji Murayama, 2011. "Reservoir Sedimentation and Flood Control: Using a Geographical Information System to Estimate Sediment Yield of the Songwe River Watershed in Malawi," Sustainability, MDPI, vol. 3(1), pages 1-16, January.
    • Handle: RePEc:gam:jsusta:v:3:y:2011:i:1:p:254-269:d:10954
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    Cited by:

    1. Yakup Darama & Zeliha Selek & Bulent Selek & Mehmet Ali Akgul & Murat Dagdeviren, 2019. "Determination of sediment deposition of Hasanlar Dam using bathymetric and remote sensing studies," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 97(1), pages 211-227, May.
    2. Domfeh, M. K. & Diawuo, F. A. & Akpoti, Komlavi & Antwi, E. O. & Kabo-bah, A. T., 2023. "Lessons for pumped hydro energy storage systems uptake," Book Chapters,, International Water Management Institute.
    3. Won Seok Jang & Jonggun Kim & Bernard A. Engel & Sung Won Kang & Youngkon Park & Heetaek Yoon & Kyoung Jae Lim & Younghun Jung & Yongchul Shin, 2014. "Development of a Prototype Web GIS-Based Disaster Management System for Safe Operation of the Next Generation Bimodal Tram, South Korea—Focused Flooding and Snowfall," Sustainability, MDPI, vol. 6(4), pages 1-20, April.
    4. Rong-Song Chen & Chan-Ming Tsai, 2017. "Development of an Evaluation System for Sustaining Reservoir Functions—A Case Study of Shiwen Reservoir in Taiwan," Sustainability, MDPI, vol. 9(8), pages 1-18, August.

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